US4888319A - Silica-alumina extrudates - Google Patents

Silica-alumina extrudates Download PDF

Info

Publication number: US4888319A
Authority: US; United States
Prior art keywords: silica; alumina; weight; mixture; process according
Prior art date: 1987-10-19
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired - Lifetime

Application number

US07/256,012

Other languages

English (en)

Inventor

Jacobus T. Daamen

Tom Huizinga

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Shell USA Inc

Original Assignee

Shell Oil Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1987-10-19

Filing date

1988-10-11

Publication date

1989-12-19

1988-10-11 Application filed by Shell Oil Co filed Critical Shell Oil Co

1989-10-10 Assigned to SHELL OIL COMPANY, A DE CORP. reassignment SHELL OIL COMPANY, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DAAMEN, JACOBUS T., HUIZINGA, TOM

1989-12-19 Application granted granted Critical

1989-12-19 Publication of US4888319A publication Critical patent/US4888319A/en

2008-10-11 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 39
239000000203 mixture Substances 0.000 claims abstract description 24
238000000034 method Methods 0.000 claims abstract description 23
QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 20
239000007787 solid Substances 0.000 claims abstract description 16
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
238000002360 preparation method Methods 0.000 claims abstract description 11
229910021529 ammonia Inorganic materials 0.000 claims abstract description 10
238000004898 kneading Methods 0.000 claims abstract description 5
238000002156 mixing Methods 0.000 claims abstract description 5
GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
229920000867 polyelectrolyte Polymers 0.000 claims description 3
BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
239000002253 acid Substances 0.000 claims description 2
150000001399 aluminium compounds Chemical class 0.000 claims description 2
238000001354 calcination Methods 0.000 claims description 2
238000001035 drying Methods 0.000 claims description 2
239000012065 filter cake Substances 0.000 claims description 2
238000004519 manufacturing process Methods 0.000 claims description 2
RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
239000004408 titanium dioxide Substances 0.000 claims description 2
239000004215 Carbon black (E152) Substances 0.000 abstract description 5
229930195733 hydrocarbon Natural products 0.000 abstract description 5
150000002430 hydrocarbons Chemical class 0.000 abstract description 5
239000003054 catalyst Substances 0.000 abstract description 3
239000000969 carrier Substances 0.000 abstract description 2
238000006243 chemical reaction Methods 0.000 abstract description 2
238000003786 synthesis reaction Methods 0.000 abstract description 2
HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 6
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
239000000377 silicon dioxide Substances 0.000 description 3
229910052783 alkali metal Inorganic materials 0.000 description 2
150000001340 alkali metals Chemical class 0.000 description 2
150000001875 compounds Chemical class 0.000 description 2
238000001125 extrusion Methods 0.000 description 2
239000000499 gel Substances 0.000 description 2
238000010438 heat treatment Methods 0.000 description 2
238000000746 purification Methods 0.000 description 2
PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
239000004111 Potassium silicate Substances 0.000 description 1
WUGQZFFCHPXWKQ-UHFFFAOYSA-N Propanolamine Chemical compound NCCCO WUGQZFFCHPXWKQ-UHFFFAOYSA-N 0.000 description 1
239000004115 Sodium Silicate Substances 0.000 description 1
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
150000001339 alkali metal compounds Chemical class 0.000 description 1
125000004432 carbon atom Chemical group C* 0.000 description 1
230000007423 decrease Effects 0.000 description 1
ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
238000006735 epoxidation reaction Methods 0.000 description 1
230000004907 flux Effects 0.000 description 1
239000007789 gas Substances 0.000 description 1
230000036571 hydration Effects 0.000 description 1
238000006703 hydration reaction Methods 0.000 description 1
150000002432 hydroperoxides Chemical class 0.000 description 1
239000004615 ingredient Substances 0.000 description 1
QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
229910052753 mercury Inorganic materials 0.000 description 1
229910052751 metal Inorganic materials 0.000 description 1
239000002184 metal Substances 0.000 description 1
229910017604 nitric acid Inorganic materials 0.000 description 1
239000003921 oil Substances 0.000 description 1
239000011148 porous material Substances 0.000 description 1
NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
229910052913 potassium silicate Inorganic materials 0.000 description 1
235000019353 potassium silicate Nutrition 0.000 description 1
NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
229910052911 sodium silicate Inorganic materials 0.000 description 1
229940032158 sodium silicate Drugs 0.000 description 1
235000019794 sodium silicate Nutrition 0.000 description 1
239000007921 spray Substances 0.000 description 1
239000010936 titanium Substances 0.000 description 1
229910052719 titanium Inorganic materials 0.000 description 1
230000004580 weight loss Effects 0.000 description 1
229910052726 zirconium Inorganic materials 0.000 description 1

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/12—Silica and alumina

Definitions

the invention relates to the preparation of silica-alumina extrudates, to the preparation of a shapable dough for silica-alumina extrudates, to a shapable dough for silica-alumina extrudates and to the preparation of calcined silica-alumina extrudates and to their use.
the invention relates to a process for the preparation of a shapable dough which comprises mixing and kneading a particulate silica-alumina with water and with an alkanolamine or ammonia to obtain a mixture having a total solids content of from 25 to 60% by weight, the alkanolamine or ammonia being present in an amount of from 0.5 to 20% by weight on the total solids content of the mixture.
the invention further relates to a process for the preparation of silica-alumina extrudates which comprises mixing and kneading a particulate silica-alumina with water and with an alkanolamine or ammonia to obtain a mixture having a total solids content of from 25 to 60% by weight, the alkanolamine or ammonia being present in an amount of from 0.5 to 20% by weight on the total solids content of the mixture and extruding the mixture.
the invention further relates to a process for manufacturing calcined silica-alumina extrudates which comprises extruding a shapable dough into silica-alumina extrudates and drying and calcining the silica-alumina extrudates to a final temperature of between 300° C. and 1000° C., and to calcined silica-alumina extrudates obtained by this process.
the silica-alumina to be used in the process according to our invention is silica-alumina obtained by reacting a silicate, preferably sodium- or potassium silicate, with an acid in the presence of an aluminium compound. Preferred is the washed silica-alumina filter cake.
silica-alumina gel When silica-alumina gel is gradually heated to a higher temperature it loses water. Heating during longer times above 100° C. results in that the water content decreases to about 5% by weight.
the water content of the silica-alumina is determined by weight loss on ignition (LOI).
LOI weight loss on ignition
a sample is weighed and then placed in a muffle furnace where it is heated at 1000° C. for 2 hours. After heating the sample is again weighed. The difference in weights represents the LOI or the amount of water present in the silica-alumina.
silica-alumina has been calcined, at e.g. 500° C., it seems less suitable for use in the extrusion process. However silica-alumina gels which have been spray dried are very suitable.
the total solids content of the mixture of silica-alumina, ammonia or alkanolamine and water ranges from 25 to 60% by weight, preferably from 30 to 45% by weight and more preferably from 35 to 40% by weight, in order to obtain an extrudable mixture.
the amount of alkanolamine or ammonia ranges from 0.5 to 20% by weight, preferably from 2 to 15% by weight, more preferably from 3 to 10% by weight calculated on the total solids content.
the mixture may also comprise a polyelectrolyte, such as Nalco 7879 (obtained from Nalco).
a polyelectrolyte such as Nalco 7879 (obtained from Nalco).
the mixture (with or without polyelectrolyte) can readily be extruded e.g. over the metal die-plate of the Bonnot-extruder.
Cylindrical extrudates can be prepared, but other forms may be prepared as well, such as mentioned in U.S. Pat. No. 4,028,227. It is possible to prepare silica-alumina with a surface area of more than 350 m 2 /g.
the alkanolamines to be used in the process according to the invention may be mono-, di- or trialkanolamines.
Preferred are monoalkanolamines, such as those containing 2 to 10 carbon atoms, e.g. ethanolamine, propanolamine, hexanolamine, nonanolamine and decanolamine.
Other examples are diethanolamine and triethanolamine.
titanium dioxide or zirconium dioxide it is possible prior to extrusion to admix titanium dioxide or zirconium dioxide to the composition. This is advantageous when the silica-alumina is used as carrier and the titanium and zirconium are the effective catalyst ingredients.
the extruded silica-aluminas may be suitably used, for example, as carriers for catalysts, which are normally used in hydrocarbon conversion, like hydrodemetallization of heavy hydrocarbon oils, in hydrocarbon synthesis reactions, in the epoxidation of olefinically unsaturated compounds with organic hydroperoxides, in the hydrations of olefinically unsaturated compounds to produce the corresponding alkanols and in the purification of exhaust gases.
catalysts which are normally used in hydrocarbon conversion, like hydrodemetallization of heavy hydrocarbon oils, in hydrocarbon synthesis reactions, in the epoxidation of olefinically unsaturated compounds with organic hydroperoxides, in the hydrations of olefinically unsaturated compounds to produce the corresponding alkanols and in the purification of exhaust gases.
a mixture was prepared having the following composition:
the mixture was prepared by adding the ethanolamine and water to the silica-alumina and the mixture was kneaded for 45 min. The total kneaded mixture was extruded.
the obtained extrudates (diameter 1.5 mm) were dried at 120° C. for 2 h, broken to pieces of about 4 to 5 mm and calcined at 500° C. for 2 h.
the silica-alumina extrudate had the following properties:

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Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Organic Chemistry (AREA)
Chemical Kinetics & Catalysis (AREA)
Catalysts (AREA)
Compositions Of Oxide Ceramics (AREA)
Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Press-Shaping Or Shaping Using Conveyers (AREA)
Solid-Sorbent Or Filter-Aiding Compositions (AREA)

US07/256,012 1987-10-19 1988-10-11 Silica-alumina extrudates Expired - Lifetime US4888319A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB8724436		1987-10-19
GB878724436A GB8724436D0 (en)	1987-10-19	1987-10-19	Silica-alumina extrudates

Publications (1)

Publication Number	Publication Date
US4888319A true US4888319A (en)	1989-12-19

Family

ID=10625528

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
US07/256,012 Expired - Lifetime US4888319A (en)	1987-10-19	1988-10-11	Silica-alumina extrudates

Country Status (10)

Country	Link
US (1)	US4888319A (de)
EP (1)	EP0313163B1 (de)
JP (1)	JP2620127B2 (de)
AT (1)	ATE64111T1 (de)
AU (1)	AU602258B2 (de)
CA (1)	CA1321215C (de)
DE (1)	DE3863160D1 (de)
ES (1)	ES2022605B3 (de)
GB (1)	GB8724436D0 (de)
ZA (1)	ZA887717B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AU664637B2 (en) *	1992-08-18	1995-11-23	Shell Internationale Research Maatschappij B.V.	Process for the preparation of a catalyst for a catalyst precursor
US20030166951A1 (en) *	2000-06-21	2003-09-04	Paul Blankenstein	Catalyst composition, process for its preparation and use thereof
US20080146721A1 (en) *	2006-12-19	2008-06-19	Kaminsky Mark P	Inorganic oxide extrudates
US20080146826A1 (en) *	2006-12-19	2008-06-19	Kaminsky Mark P	Direct epoxidation process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5074990A (en) *	1987-10-30	1991-12-24	Exxon Research And Engineering Company	Fluid catalytic cracking using catalysts containing an alumina-on-silica component
FR2670687A1 (fr) *	1990-12-21	1992-06-26	Shell Int Research	Procede pour l'extrusion d'aluminosilicates cristallins.

Citations (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2348072A (en) *	1943-03-31	1944-05-02	Universal Oil Prod Co	Manufacture of catalysts
US2480669A (en) *	1946-04-24	1949-08-30	Socony Vacuum Oil Co Inc	Process of preparing extruded gels
US3346509A (en) *	1964-06-12	1967-10-10	Gulf Research Development Co	Co-precipitated silica-alumina catalyst process and composition
US3390100A (en) *	1964-02-14	1968-06-25	American Cyanamid Co	Process for the preparation of extrudates from hydrogels
US3519574A (en) *	1964-02-14	1970-07-07	American Cyanamid Co	Process for manufacture of catalyst material and catalyst material produced thereby
US4039474A (en) *	1975-10-20	1977-08-02	Nalco Chemical Company	Silica-alumina catalysts
US4174301A (en) *	1977-08-31	1979-11-13	Nalco Chemical Company	Polycarboxylic acids as extrusion aids for silica-aluminas
US4256682A (en) *	1980-03-05	1981-03-17	W. R. Grace & Co.	Method of preparing silica gel pellets
US4482642A (en) *	1981-08-19	1984-11-13	Degussa Aktiengesellschaft	Process for the production of slugs of pyrogenically produced oxides
US4582815A (en) *	1984-07-06	1986-04-15	Mobil Oil Corporation	Extrusion of silica-rich solids

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3442821A (en) *	1966-09-29	1969-05-06	Universal Oil Prod Co	Manufacture of spheroidal silica-alumina particles
FR2154905A5 (en) *	1971-09-29	1973-05-18	Engelhard Min & Chem	Silica-alumina catalysts - contg relatively high concns of alkali metals
US4264474A (en) *	1978-08-21	1981-04-28	Filtrol Corporation	Ammoniated silica-alumina gel and catalyst containing the same and processes for producing same
US4542118A (en) *	1984-02-02	1985-09-17	W. R. Grace & Co.	Catalyst manufacture

1987
- 1987-10-19 GB GB878724436A patent/GB8724436D0/en active Pending
1988
- 1988-10-04 CA CA000579205A patent/CA1321215C/en not_active Expired - Fee Related
- 1988-10-11 US US07/256,012 patent/US4888319A/en not_active Expired - Lifetime
- 1988-10-17 ZA ZA887717A patent/ZA887717B/xx unknown
- 1988-10-17 JP JP63259623A patent/JP2620127B2/ja not_active Expired - Lifetime
- 1988-10-17 AU AU23931/88A patent/AU602258B2/en not_active Ceased
- 1988-10-18 DE DE8888202328T patent/DE3863160D1/de not_active Expired - Lifetime
- 1988-10-18 ES ES88202328T patent/ES2022605B3/es not_active Expired - Lifetime
- 1988-10-18 AT AT88202328T patent/ATE64111T1/de not_active IP Right Cessation
- 1988-10-18 EP EP88202328A patent/EP0313163B1/de not_active Expired - Lifetime

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2348072A (en) *	1943-03-31	1944-05-02	Universal Oil Prod Co	Manufacture of catalysts
US2480669A (en) *	1946-04-24	1949-08-30	Socony Vacuum Oil Co Inc	Process of preparing extruded gels
US3390100A (en) *	1964-02-14	1968-06-25	American Cyanamid Co	Process for the preparation of extrudates from hydrogels
US3519574A (en) *	1964-02-14	1970-07-07	American Cyanamid Co	Process for manufacture of catalyst material and catalyst material produced thereby
US3346509A (en) *	1964-06-12	1967-10-10	Gulf Research Development Co	Co-precipitated silica-alumina catalyst process and composition
US4039474A (en) *	1975-10-20	1977-08-02	Nalco Chemical Company	Silica-alumina catalysts
US4174301A (en) *	1977-08-31	1979-11-13	Nalco Chemical Company	Polycarboxylic acids as extrusion aids for silica-aluminas
US4256682A (en) *	1980-03-05	1981-03-17	W. R. Grace & Co.	Method of preparing silica gel pellets
US4482642A (en) *	1981-08-19	1984-11-13	Degussa Aktiengesellschaft	Process for the production of slugs of pyrogenically produced oxides
US4582815A (en) *	1984-07-06	1986-04-15	Mobil Oil Corporation	Extrusion of silica-rich solids

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AU664637B2 (en) *	1992-08-18	1995-11-23	Shell Internationale Research Maatschappij B.V.	Process for the preparation of a catalyst for a catalyst precursor
US20030166951A1 (en) *	2000-06-21	2003-09-04	Paul Blankenstein	Catalyst composition, process for its preparation and use thereof
US7713906B2 (en) *	2000-06-21	2010-05-11	Shell Oil Company	Catalyst composition, process for its preparation and use thereof
US20080146721A1 (en) *	2006-12-19	2008-06-19	Kaminsky Mark P	Inorganic oxide extrudates
US20080146826A1 (en) *	2006-12-19	2008-06-19	Kaminsky Mark P	Direct epoxidation process
US7563740B2 (en)	2006-12-19	2009-07-21	Lyondell Chemical Technology, L.P.	Direct epoxidation process
US7825204B2 (en)	2006-12-19	2010-11-02	Lyondell Chemical Technology, L.P.	Inorganic oxide extrudates
US7855304B1 (en)	2006-12-19	2010-12-21	Lyondell Chemical Technology, L.P.	Inorganic oxide extrudates

Also Published As

Publication number	Publication date
DE3863160D1 (de)	1991-07-11
JP2620127B2 (ja)	1997-06-11
AU2393188A (en)	1989-04-20
AU602258B2 (en)	1990-10-04
ATE64111T1 (de)	1991-06-15
ZA887717B (en)	1989-06-28
JPH01145369A (ja)	1989-06-07
CA1321215C (en)	1993-08-10
ES2022605B3 (es)	1991-12-01
EP0313163A1 (de)	1989-04-26
EP0313163B1 (de)	1991-06-05
GB8724436D0 (en)	1987-11-25

Legal Events

Date	Code	Title	Description
1989-10-10	AS	Assignment	Owner name: SHELL OIL COMPANY, A DE CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:DAAMEN, JACOBUS T.;HUIZINGA, TOM;REEL/FRAME:005152/0978 Effective date: 19880908
1989-10-18	STCF	Information on status: patent grant	Free format text: PATENTED CASE
1992-12-06	FEPP	Fee payment procedure	Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY
1993-05-17	FPAY	Fee payment	Year of fee payment: 4
1997-06-09	FPAY	Fee payment	Year of fee payment: 8
2001-05-31	FPAY	Fee payment	Year of fee payment: 12

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US5106549A (en)	1992-04-21	Titania extrudates
RU2058814C1 (ru)	1996-04-27	Катализатор для селективного восстановления окисей азота аммиаком и способ его приготовления
US4448896A (en)	1984-05-15	Hydrogenation catalyst for desulfurization and removal of heavy metals
KR940000869B1 (ko)	1994-02-03	모노리드식 촉매 지지체 및 그의 제조방법
AU663621B2 (en)	1995-10-12	Process for extruding crystalline aluminosilicates
EP1192990B1 (de)	2004-06-30	Verfahren zur Herstellung eines Katalysators zur selektiven katalytischen Reduktion von Stickoxiden
US3856708A (en)	1974-12-24	Alumina catalyst support
JPS63240945A (ja)	1988-10-06	イオウ化合物を含有する工業ガスの処理方法
EP0167324A2 (de)	1986-01-08	Extrusion kieselsäurereicher Feststoffe
EP0762932B1 (de)	2001-06-27	Katalysatorträger auf der basis von titanoxyd
NL1004224C2 (nl)	1997-01-13	Katalysator en werkwijze voor het omzetten van stikstofverbindingen.
EP0309048B2 (de)	1999-11-24	Silica-Extrudate
US4119568A (en)	1978-10-10	Solid supported catalysts for catalytic reduction of nitrogen oxides in waste gases
EP0313163B1 (de)	1991-06-05	Siliciumdioxid-Aluminiumoxid-Extrudate
US4174301A (en)	1979-11-13	Polycarboxylic acids as extrusion aids for silica-aluminas
US4780446A (en)	1988-10-25	Alumina-silica cogel
US4045372A (en)	1977-08-30	Control of physical properties of alumina extrudates
CA2056000A1 (en)	1992-07-29	Composition and method of making high porosity, high strength compositions
CA1211428A (en)	1986-09-16	Alumina-silica cogel
DE4311650C2 (de)	1996-06-05	Hochporöse Formlinge auf der Basis von Aluminiumoxid und deren Verwendung
JPH05168921A (ja)	1993-07-02	ジルコニア成型担体およびその製造方法
JPS5820304B2 (ja)	1983-04-22	排ガス中の窒素酸化物除去用触媒